In a double slit experiment the distance between the slits is 0.1 cm and the screen is placed at 50 cm from the slits plane. When one slit is covered with a transparent sheet having thickness 
and refractive index 
, the central fringe shifts by 0.2 cm . The value of 
is 
cm.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Given: 
, Shift 
Optical path difference by sheet: 
Shift of central fringe: Shift 
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